Sprinkler nozzle



Oct. 11, 1950 K. J. FARMER EI'AL 2,955,765

SPRINKLER NOZZLE Filed Nov. 20, 1957 k I J 3 Fig. 4

o /|O l2 INVENTORS Kenneth J. Former .Aphrncr SPRINKLER NOZZLE Kenneth J. Farmer, Longview, Tex., and Bernard F. Fay, Edgewood, Md., assignors to the United States of America as represented by the Secretary of the Army Filed Nov. 20, 1957, Ser. No. 697,753

2 Claims. (Cl. 239-380) (Granted under Title 35, US. Code (1952), sec. 266) The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment to us of any royalty thereon.

This invention relates to a rotating nozzle for creating a fan shaped spray. The nozzle is particularly effective in laying down a ribbon of spray of limited and rather specific width such as would be necessary in spray covering a roadway landing strip or other large area.

In creating such a ribbon spray, a fixed nozzle is not always satisfactory since there is a tendency to clogging and variable flow with resulting nonuniformity of coverage. A fixed spray head moreover produces a longitudinal coverage, whereas with the present invention the noz zle is made to sweep transversely over the area to be covered. This sweep coupled with the forward motion of the vehicle to which the nozzle is attached results in a diagonal sweep of the covered area. This type of compound motion coverage has been found to be superior to the fixed spray type and to be less susceptible to malfunctioning.

In the drawings, Fig. 1 shows a side view of the device. Fig. 2 is an axial section through the same view. Fig. 3 is a transverse section at 33 of Fig. 1. Fig. 4 shows a detail of the rotor.

More particularly, body section 2 is fitted with a cylindrical cavity 4 which opens out through the tapered fan shaped discharge opening 6. Discharge opening 6 extends approximately 180 about the axis of the rotor and serves as a valve to turn the jets on and off as they emerge from and pass into the stator body (Fig. 3). The discharge opening flares about 30 laterally. The latter angle is not critical, however, and needs only be large enough so that its sides clear the jets. Cylindrical cavity 4 opens axially through bore 8 which supports rotor shaft 12. Rotor 10 is recessed at 14 and multiple radial bores 16 penetrate the rotor from the recess outward. The rotor shaft passes out through sleeve 18 which is equipped with packing 20, gland 22 and compression nut 24.

On the other side of the rotor 10, the stator section United States Patent Patented Oct. 11, 1950 2 is recessed at 26 to receive threaded nipple 28. This nipple serves to position the rotor longitudinally and is adjusted to about .008 in axial clearance of the rotor. Nipple 28 has a longitudinal bore 30 which coincides axially with recess 14 in the rotor. Coupling threads 32 permit the attachment of a supply conduit to feed the nozzle. Other structural details include neoprene washer 34 which serves as a packing, set screw 36 for holding nipple 28 in fixed position and tapped sockets 38 for attaching the spray nozzle to the vehicle and equipment. In operating the device, rotor shaft 12 is attached to a source of power and is rotated at a relatively slow r.p.m. to give the best sweeping coverage. In specific trials using a slurry, it was found that 66 r.p.m. was optimum for good coverage and prevention of mist. Optimum height above the road surface was found to be about 3 /2 feet for the 20 foot wide road being covered in one pass. The slurry was fed through nipple 30 -by a suitable pump at about 7 to 10 p.s.i., resulting in the application of about 5 gaL/min. In order that the rotor and stator spacing may be maintained and wear minimized in the handling of slurry, it is desirable to chrome plate the contacting parts. In operating the device at the suggested rpm. it is obvious that the rotor has a distribution function only and centrifugal force plays no part in the velocity of the emerging liquid. This possesses the advantage that rpm. and pressure can be set at optimum values without any interrelationship. a

We claim:

1. A power spray nozzle comprising a cylindrical rotor having a cylindrical axial recess at one end and a drive shaft of lesser diameter than the rotor at the other end, radial perforations in the cylindrical recessed walls of said rotor, a close fitting stator supporting and enveloping said rotor and shaft, a radial recess in said stator exposing the radial perforations in the rotor for approximately half of its circumference, axial conduit means in said stator for supplying liquid under pressure to the interior of said recessed rotor.

2. A power spray in accordance with claim 1 including a fiuid supply nipple threaded into the stator axially of said rotor for supplying liquid to and for endwise positioning of said rotor and including a packing gland on said stator about said drive shaft.

References Cited in the file of this patent UNITED STATES PATENTS 2,063,048 Norris Dec. 8, 1936 2,233,855 Suss Mar. 4, 1941 2,251,457 Lee Aug. 5, 1941 2,450,599 Kloda Oct. 5, 1948 2,602,002 Schutt July 1, 1952 

